C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

TPiS Exhaust

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Old Jan 28, 2008 | 06:12 PM
  #1  
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Default TPiS Exhaust

Hi!

I found myself interested in the TPiS Exhaust system, again, as I saw them advertising it for sale on EBay for the first time (I think it's the black finish--makes it look tough). I made TPiS an offer (less than the $600 sales price) which they kindly refused. They also mentioned that they were selling 2 or 3 a week. Has anyone bought this system recently for an L98 and can tell me anything about it? I am particularly interested in the sound, of course. Aggressive?

Thanks!
/s/ Chris
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Old Jan 28, 2008 | 07:30 PM
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Originally Posted by Chris Kennedy
Hi!

I found myself interested in the TPiS Exhaust system, again, as I saw them advertising it for sale on EBay for the first time (I think it's the black finish--makes it look tough). I made TPiS an offer (less than the $600 sales price) which they kindly refused. They also mentioned that they were selling 2 or 3 a week. Has anyone bought this system recently for an L98 and can tell me anything about it? I am particularly interested in the sound, of course. Aggressive?

Thanks!
/s/ Chris
I am running the TPIS cat back exhaust. It is a nice item, comes with flowmaster mufflers.

I couldn't bolt it on myself, I had to have a muffler place cut and weld it for me. 65Z01 runs the same exhaust, we both like it alot.

Vic
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Old Jan 29, 2008 | 09:45 AM
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Chris,
I don't know what you have for a set-up, but I have heard that these systems are not for stockers. They have a 3.5" pipe coming off of the cat and then splitting into dual 3" pipes. There a some folks that believe that no back pressure is the only way to go, but I have head that some back pressure is a good thing, especially for torque. I actually asked TPIS about this system they said it would kill the low end torque of a stock engine, really belongs on a car that has heads and a cam. If you have those, then it may be a sound choice.

Adam.
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Old Jan 29, 2008 | 10:54 AM
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What year car and any other mods. Fill out your profile. BTW I think EM has a group purchase going. Their fitment and features are supposed to be better.

Last edited by BADDUCK; Jan 29, 2008 at 10:56 AM.
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Old Jan 29, 2008 | 12:26 PM
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Originally Posted by MATCHLIGHT
Chris,
I don't know what you have for a set-up, but I have heard that these systems are not for stockers. They have a 3.5" pipe coming off of the cat and then splitting into dual 3" pipes. There a some folks that believe that no back pressure is the only way to go, but I have head that some back pressure is a good thing, especially for torque. I actually asked TPIS about this system they said it would kill the low end torque of a stock engine, really belongs on a car that has heads and a cam. If you have those, then it may be a sound choice.

Adam.
Thanks---I'm currently using one of TPiS's older y-pipes (same size as the pipe in this system) with straight through 3" pipes out back. I haven't noticed less torque, but you mentioning that you asked them about this is VERY interesting. They should probably state this up front in their catalog.

Cheers,

/s/ Chris
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Old Jan 29, 2008 | 12:28 PM
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Originally Posted by BADDUCK
What year car and any other mods. Fill out your profile. BTW I think EM has a group purchase going. Their fitment and features are supposed to be better.
Yeah, you're right, I really need to fill out the profile! No mods, though ('89 6-spd). Incidentally, what is "EM"??

Thanks,

/s/ Chris
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Old Jan 29, 2008 | 12:37 PM
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Originally Posted by Chris Kennedy
Yeah, you're right, I really need to fill out the profile! No mods, though ('89 6-spd). Incidentally, what is "EM"??

Thanks,

/s/ Chris
I ran this same exhaust on my bolton setup and picked up HP !

Vic
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Old Jan 29, 2008 | 12:46 PM
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Wow, guess I'm in good company with Vic & 65ZO1 running it. I like the black finish, so far no real rusting inside the pipes (I only put on 2-3K miles a year). Not loud at idle, but I'm stock cam/heads 85. To me, it sounds a little "boaty" at cruise with the LT headers, much better at WOT.
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Old Jan 29, 2008 | 04:10 PM
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Originally Posted by Chris Kennedy
Yeah, you're right, I really need to fill out the profile! No mods, though ('89 6-spd). Incidentally, what is "EM"??

Thanks,

/s/ Chris
Exotic Muscle, they offer LT headers specially for Corvettes. Do a search, they more up to date than TPiS IMO. .
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Old Jan 30, 2008 | 03:10 PM
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Thanks, everyone, for your replies. Well, until TPiS agrees to reduce its price, if anyone wants to sell a used TPiS system for an '89 please let me know.

Cheers,

/s/ Chris
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Old Jan 30, 2008 | 09:12 PM
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Using TPiS headers on my 89 track car in addition to cold air induction, modified/bored MAF, 52 mm throttle body, fully ported plenum, ported SLP runners, AFR heads, TPis ZZ409 roller cam with 1:5 roller rockers, MSD ignition & distributor, misc accessories, and Corsa exhaust with cat eliminated. The car runs nicely and makes good power to 6,000.
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